ITT HT 3196 i-FRAME Installation, Operation And Maintenance Manual page 96

Maintenance
2. Install the outboard bearings (112A) on the shaft (122).
The regreasable bearing has a single shield. Make sure that the bearing is installed with the shield away
from the impeller.
The duplex bearings are mounted back-to-back. Make sure that the orientation of the bearings are
correct.
a) Inspect the shaft (122) to ensure that it is clean, dimensionally correct, and is free of nicks and
b) Lightly coat the bearing seating with a thin film of oil.
c) Remove the bearings (112) from their packaging.
d) Wipe the preservative from the bearing (112) bore and outer diameter.
e) Use an induction heater with a demagnetizing cycle to heat both bearings (112) to an inner ring
f) Place both bearings (112) on the shaft (122) with the large outer races together (back-to-back).
g) Position the bearings (112) on the shaft (122) against the shoulder and snug the locknut (136)
h) Remove the bearing locknut (136) after the bearings (112) are cool.
3. Put the lockwasher (382) onto the shaft (122).
4. Thread the locknut (136) onto the shaft (122) and tighten it until it is snug.
5. Bend the tangs of the lockwasher into the slots of the locknut.
6. Place the bearing-clamp ring (253B) onto the shaft (122).
Make sure that the orientation of the bearing-clamp ring is correct.
7. Coat the inner surfaces of the bearings with lubricant.
8. Put the inboard bearing (168) onto the shaft (122).
94
113A
372T
408W
761B
408N
408M
370F
burrs.
122
112
temperature of 230 °F (110 °C).
against the bearings until they are cool.
The locknut prevents the bearings from moving away from the shaft shoulder as they cool. Rotate
the outer bearing rings relative to each other as they are placed on the shaft to assure good
alignment.
Model HT 3196 i-FRAME Installation, Operation, and Maintenance Manual
408W
319
408N
408A
241
136